Improvement in knitting-machine burrs



PaTnNT Urraca;

CHARLES AIJLARDICE, OFl COHOES, NEW YORK.

IMPROVEMENT IN KNlTTlNG-MACHINE BURRS.

Specification forming part of Letters Patent No. 412,545, dated May 3,1864.

T0 all whom it may concern:

Beit known that l, CHARLES ALLARDICE, of Cohoes, in the county of Albany and State ot' New York, have invented a new and usei'ul Improvement in Rotary Burrs for Knitting-Machines; and I do hereby declare that the following is a full7 clear, and exact description of the same, reference being had to the accompanying drawings, foiniing a part of this specification, in which- Figure l is ai'ace view of aburr constructed atcording to my invention. Fig. 2 is a cential section of the same. Fig. 3 is a central section ot' the hub without the bush and sinkers. Fig. 4 is a side view of one ofthe sinkers.

Similar letters ot' reference indicate corresponding parts in the several figures.

This invention consists in securing the removable sinkers or wings in oblique radial slots in the hub of the burr by providing a chamber in the bore of the said hub for the reception ot' dove-tail tongues on the inner edges of the sinkers, and constructing a shoulder ou the bush to bear against the said tongues and eoniine them within the chamber, whereby the construction ot' the burr is simplilied and great facility is afforded for the re! l inoval and replacement of the siiiliers. y

To enable others skilled in the art to construct burrs accordin to my invention, I will proceed to describe it with reference to the drawings.

A is the hub, made of brass or other metal, of cylindrical iorm and having oblique radial slots c eut in its periphery for the reception of the sinkers or wings B B. The said hub has its central bore smaller on one side, as shown at c a in Fig. 3, and larger on the other side, as shown at b bin the same iigure,the larger bore bein g somewhat smaller a than ciicleinscribed within the bottoni of the slots c, provided for the sinkers, and between the larger and smaller bores there is turned in its interior a chamber, e, which is sufficiently larger than the bore b to meet the slots c, and the side of this chamber next the smaller bore, c, is beveled, as shown at t' in Figs. 2 and 3.

The sinkers B have each on its inner edge a projecting tongue, u, which is of such width that it will just enter the chamber e when the sinker is inserted into its slot, and of such depth that when the inner edge, o, of the sinker is on the bottom of its slot in the hub the edge r of the said tongue is within the circle of the bore b I), that a shoulder, s, formed by the larger portion of the bush C, may abut against one side ofthe said tongue. The edge of the tongue which comes next the bevel of the chamber ot' the hub is beveled to correspond, giving that side ot' the tongue a dovetail form.

A portion of the steel bush C is madle to tit the larger bore, b, ot' the hub, and another portion to tit the smaller bore, a, and a screwthread is cut on the end of the smaller portion and fitted with a nut, D.

In constructing the burr the sinkers are first placed in the several grooves of the hub with their edges o at the bottoms of the said grooves. The bush is then inserted through the bore ot' the hub from the larger side and the nut applied on the opposite side and screwed up, by which means the shoulder s of the bush is made to press against the contiguous edges ot the tongues and force their opposite dovetailedges against the beveled surface i of the cha-mbar ot' the hub, and so secure the sinkers firmly, the dovetail-edges of the tongues preventing them from being drawn out from the hub, While the shoulder on -the bush and the face t' of the chamber contines them in a longitudinal direction.

To take out the sinkers the nut is rst taken ott and the bush drawn out, and the sinkers can then be drawn from their respective slots in the hub by a pair of pliers.

What I claim as my invention, and desire to secure by Letters Patent, is-

The combination of the chamber e in the hub, the dovetail-tongues n on the siuliers, and the shoulder s' on the bush, substantially as and for the purpose herein set forth.

CHARLES ALLARDICE.

Witnesses:

P. D. NrvER, B. S. Losnn. 

